has come back 和had come back 表示的时态区别

相关推荐

• he gets out of his car and walks to the shopping mall . he went out of the room and come back afew minutes later. get out of 和,go out of的区别
• why did you come back so late today?it heavily when the meeting was over .I had to wait until it came to a stop 为什么?处要填was raining还有when与while的区别是什么?
• be back ,come back和go back 的用法区别.
• 这句话为什么用过去时新目标9年级第十四单元的一篇文章,He's already visited the place where his ancestores lived.通篇都用的现在完成时和一般现在时（只有讲到“祖先”们怎样怎样时才用一般过去时）,可在倒数第二段插了一句一般过去时,而且不是讲“祖先”的,我很不理解,整篇文章如下：Have you been back to the place where your ancestors lived,worked,studied and played?Robert Qian,a Chinese Canadian,already has.Now in China,he has found that his family is like a tall tree with long roots.Robert is just one young overseas Chinese who has come to visit his ancestors' home
• turn back和come back分别什么意思,区别在哪儿店主找回我的包.he turn back quickly.如用came back呢
• 一般过去时和现在完成时时间状语北京西城区一摸题28.—Hi,Nancy ,I didn’t know you had come back .So have you graduated from college?—Yes .I French for four years in Nanjing.A．have studied B．had studied C．studied D．am studying不是说有for+段时间作时间状语都得用完成时吗?还是说没那么绝对,要具体问题具体分析.这里的4 years由题意可知是明确的过去的一段时间,故用一般时.
• 英语语法 时态M:I know I promise to drive you to the airport next Thursday,but I’m afraid something has come up.They’ve called a special meeting at work.W:No big deal.Karen said she 【was】 available as a back-up.为何是was...他们是不是说下个周四的事吗...那不是应该是will be吗...如果说是因为karen在过去说了 那么said不就是过去式吗.
• to come back.和to return有区别吗我的理解是to come back.是回来哪,to return是回去哪,但是躯体的区别是什么?回来,回去.是要做的动作,还是正在进行的动作,还是已经完成的动作啊?
• come back 和 be back、get back的区别是什么?
• come back和 get back的区别
• 一物体做加速直线运动,依次经过A,B,C三点,B为AC中点,物体在AB段的加速度恒为a1,在BC段的加速度恒为a2,且vB=（vA+vC）/2,则加速度a1 a2的大小为：
• 金融杠杆理论是什么?